Influence of replacing fish meal with soybean meal on growth rate, feed conversion ratio and chemical composition of carcass, fillet and liver in juvenile stellate sturgeon (Acipenser stellatus)
2013
Emdadi, B. | Sajadi, M.M. | Yazdani, M.A. | Shakoorian, M.
This study was conducted to determine the effect of replacing fish meal with soybean meal on growth rate, feed conversion ratio and chemical composition of carcass, fillet and liver in juvenile stellate sturgeon (Acipenser stellatus). As in Treatments one (F), two (S1), three (S2), four (S3) and five (S4) 0, 10, 20, 30 and 40 percent of fish meal was replaced with soybean meal, respectively. Five isonitrogenous and isocaloric diets formulated containing 44 percent crude proteins and 4374 Kcal gross energy kg-1 diet. Individual body weights of fish were measured every three week. Fish were sampled randomly from each treatment for whole body, fillet and liver proximate analysis. Based on the results, weight gain (WG) and feed conversion ratio (FCR) had significant difference among the treatments (P<0.05), as S3 and S4 diets had significantly weakest performance than any of other diets (P<0.05). FCR in fish fed on F and S1 diets were significantly higher than fish fed on other diets, while statistical significant differences were observed between S2 with two other treatments. Significant differences were found in carcass protein, lipid, and moisture content in fish fed on diets with different soybean meal levels (P< 0.05), but ash content have not significant difference among the diets (P>0.05). Significant differences were found in fillet lipid content (P<0.05), but protein, moisture and ash content did not significant difference (P>0.05). Liver proximate composition of fish did not significant difference (P>0.05).
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